Fluid pressure regulator



Apri122,1.141.` WAM 2,239,116

FLUID PRESSURE REGULATOR Filed Jan. 11, 1939 2 Sheets-sheet 1 21 williamA Ray` INVENTOR,

A TTORNEY April 22, 1941. w; A. RAY 2,239,116

FLUID PRESSURE REGULATOR Filed`Jan. l1, 1939 2 Sheets-Sheet 2 59AINVENToR v. l BY /L 7K ATTORNEY description and accompanying drawingsPatented Apr. 22', 1941 UNITED STATE S PATENT OFFICE Application Jannary1 1 claim.

My present invention relates to improvements in fluid pressureregulators and particularly in that type of regulator which ployed tocontrol the pressure of the fuel suppliedto gas consuming devices.

A chief object of my invention is theprovision of a gas pressureregulator which is inexpensive to manufacture.

A further object of my' invention is the provision of a gas pressureregulator, the main component parts of which are fabricated of sheetmetal.

A further object is the provision of a regulator which is eilicient inmaintaining a substantially constant outlet pressure independent of theinlet pressure of the gas line and which includes aspirating meansactuated by the gas passing through the outlet of the regulator wherebychange in outlet pressure caused by variation in the rate of flow ofgasthrough the regulator is minimized.

is commonly ,em-

Other objects and advantages of invention A will be found in thedescription, the drawings and the appended claim.

For complete understanding of my invention, reference may be had to thefollowing detailed in which:

Figure l is a sectional view of a regulator em-r bodying my invention;

Figure 2 is a section taken on the line 2-2 of Fig. 1;

Figure 3 is an end elevation of the regulator shown in Fig. .1;

Figure 4 is a sectional view of a modified form of regulator embodyingmy invention; vand Figure 5 is an end elevation of the regulator shownin Fig. 4'.

Referring ilrst to Figs. 1-3 of numeral II denotes an upper, upwardlydished, sheet metal member, and the numeral I2 denotes a somewhatsimilar, but downwardlynished, lower sheet metal member.v The members IIand I2 are provided with horizontal peripheral flange portions I3 and I4respectively by means of which the said members are secured togetherwith the vmargin of a flexible diaphragm I5 therebetween which with thesaid members defines an upper compartment I6 and a lower compartmentI'I.

A third sheet metal member I8, downwardly dished and having a horizontalperipheral ange portion I9. is secured thereby to the underside of theiiange of the lower member I2 with a sealing gasket 20 therebetween.

A sheet metal duct 2i, of U-shaped cross-secin that position by a nutthe drawings, the I tion, the member tion and having an inlet 22 and anoutlet 23, is secured at its open edges to bottom wall or member I8 andis provided with hollow rectangular members 24 and 25 which areinternally threaded for connecting the regulator in a gas conduit.

The bottom wen er member le is sut te pm-v vide a tongue 26 which isbent downwardly into contact with thebottom and side walls of the duct2| to form a partition separating the inlet and the outlet of said duct.

In manufacturing the regulator of my invenwith the tongue 26 and thethreaded members 24 and in position and the respective parts sealinglysecured together. by oven brazing.v Or, if

preferred, they parts may be resistance-welded.

together. l x

Surrounding a cylindrical opening formed in the bottom wall of memberI8. is a grommetshaped valve seat member 2l of resilient material suchas synthetic the underside of said valve seat member to control fluidnow through the duct 2l is a valve member 28 secured, as by riveting, tothe lower end portion of `a valve stem 23.

The upper portion of the valve stem extends through a. passageway 30formed in the bottom wall of member I2, the passageway being largeenough to provide clearance around the stem through which gas can passThe reduced upper end portion of valve stem 29 is threaded and extendsthrough a concentric opening formed in the diaphragm I5 and throughupper and lower cup-shaped washers 3| and 32 arranged on opposite sidesthereof and is held 33 and washer 34.

In assembling the regulator, the valve member 28 is passed from abovethrough the opening in member I8 before the seat member 2`l-ispositioned therein.

An upstanding tubularextension 35 having a' end to said extension as bybrazing and at itslower flanged end to the member II. Rivets 31 serve tosecure both the extension 35 and the shell 36 to the member II.

Threadedly received in the screw shell 36 is a second screw shell 38having an upper end wall '38 provided withv a recess 40 for thereception of a screwdriver blade. A third screw shell 4 I havtheunderside of the I6 'is assembled on the duct 2l rubber. Cooperable withf into compartment I'I.

42, and provided with an e outwardly hanged upper end portion.'43,serves as means for sealing the upper end of the screw shell 86.

A spring 44, compressed between the upper Wall of the tension regulatingshell 88 and the washer through an opening 48, formed in the bottom.

wall of member I8 by the depression of the tongue 28, into the regulatoroutlet 23 and serves as aspirating means, actuated by I, gas ilowthrough said outlet, for lowering the pressure of the gas in the lowercompartment l1.

In the operation of .the regulator, gas from the line ows through theinlet 22. the valve port, the opening 48 and the outlet 23 to the gasconsuming device.

Inlet pressure, applied to the compartment I1 below the diaphragmthrough the restricted passageway 38 and notches 49 provided intheperiphery of ywasher 82, tends to move the valve member 28rupwa'rdagainst the bias of spring 44 to partially close the valve. 'I'he higherthe inlet pressure the greater is the force tending to close the valve,and vice versa, and consequently the diaphragm is balanced at apressure, governed mainly by the adjusted tension of the spring 44 andthe clearance around the valve stem in the lator, the aspirating means41 tends to main-l tain the pressure in the compartment I1 lower thanthat existing in the outlet 23, by reason of the exhausting action ofthedluid flowing past the lower end of the tube 41, and thus the eiIectof the inlet pressure applied below-the diaphragm is reduced withincreased flow. The outlet pressure thus remains substantially constantwith variation in the rate of dow.

Referring now to the modiiled regulator'shown in Figs. 4 and 5, thenumeral 5I denotes an upper dished sheet metal member andthe numeral 52a lower, somewhat similar.,dished sheet metal member, which members ansecured together with the margin of a ilexible diaphragm 58 therebetweento provide anuppe'r and a lower compartment 54 and 55 respectively.

Secured to the underside of the lower member 52 is a body or ductmemberv 58 having an inlet 51 and an outlet 58 provided with ilttings 59and 80 for connecting the regulator in a gas line. The iitting 58 isprovided with an extension il constituting a valve port member having avalve seat 52 formed thereon. Cooperable with said valve seat to controlgas ilow through the regulator4 is a valve member 53 supported in a cup84 which is pivotally connected'by a link 85 to the upper end portion o!a bell-crank lever 88` which is pivotally 'mounted in a bracket 81brazed or resistance-welded to the bottom wall 69 which is spaced fromthe wall of the port by ilns 10, serves 'as guide means for the valvemember.

'I'he lower end portion of the beh-crank lever is pivotally connected bya link 1I to a stem 12 whichJ extends upwardly through a guidepassageway 18 formed in the bottom wall of member 52, which passagewayis made large enough to permit gas to pass freely around the stem 12into the compartment 55. The upper portion of stem 12 is ,secured to thediaphragm 53 with cup washers 14 and 15 on opposite sides thereof.

'I'he top wallY of member 5I has an upstanding tubular extension 18formed therein which supports at its upper end a screw shell 11.Threadedly received in said screw shell is a second screw shell 18having an upper wall 19. A third screw shell 80, having a. lower wall8|, serves as a cap for sealing the upper end oi' shell 11.

Compressed between the wall 19 of shell 18 and washer 14 is a spring 82which biases the diaphragm downward and, therethrough, the valve toclosed position. 1

Aspirating means, connecting the compartment 55 with the regulatoroutlet 5l, comprises a tubular member .83.

'Ihe operation of the modied regulator shown in Figs. 4 and 5 will, itis believed, be obvious from the foregoing description of the operationof the regulator shown in Figs. 1-3, the operation of lboth iorms beingsubstantially identical. In the embodiment shown in Figs, 4 and 5,however, impingement upon the diaphragm oi' the l gas flowing from theinlet oi' the regulator through the clearance around the stem 12 is lessthan in the embodiment rst described by reason oi' the positioning ofthe respective valves.

While I have herein shown and described prel ferred embodiments of mypresent invention, it

ot said duct. A rod Il, seciued to the cup 84 is obvious thatmodiilcations may be made therein without departing from the spirit ofmy invention, which invention is to be limited therefore only by thescope o! the appended claim.

I claim as my invention:

A iluid pressure regulator comprising an upper Y and a lower dishedsheet metal member each provided with a peripheral horizontal nange bymeans oi which said members are secured together to provide a chamber, ailexible diaphragm dividing said chamber into an upper and a lowercompartment and secured at its margin between said ilangesa third sheetmetal member downwardly disnea and provided with a peripheral horizontalilan'ge and secured thereby tothe underside of the' ilange oi' saidlower member. said third member being provided with va horilontalpassageway having an inlet and an outlet, means in said inlet and saidoutlet for connecting the regulator inv a fluid conduit, valve means forcontrolling iluid ilow through said passageway, means'operativelyconnecting said valve means with said diaphragm andpextending freelythrough smopening formed in the bottom wall of said lower member,aspiratingv means connecting-the interior of said lower compartment withsaid outlet. and means in said upper compartment biasing said diaphragmdownward and therethrough said valve means to open position.

` WILLIAM A, luv.

